Interval Timer ~ HIIT & Tabata vs Shift

"The timer numbers are too small to see mid-workout." "I wish I could instantly know when my rest is over." — Sound familiar? This app is an interval timer designed for strength training and HIIT, delivering your workout status intuitively through color changes. The screen turns "Burning Coral" during exercise and "Calm Indigo" during rest — so even if your phone is across the room, a single glance at the color tells you exactly what to do next. ■ Intuitive Timer Experience Through Visual Cues Reading tiny numbers when you're pushing your limits is frustrating. That's why this app features a unique color system. Color Navigation: The screen color changes dynamically for each phase — exercise, rest, and preparation. A glimpse of color at the edge of your vision keeps you informed without breaking your focus, so you can stay fully locked in on your workout. Minimal Design: Only the essential information, displayed large and clear. A clean, distraction-free UI means you can always operate it instinctively. ■ Even More Convenient with Apple Watch If you have an Apple Watch, you can control and track everything right from your wrist. Control & Check at a Glance: Start a timer on your iPhone and monitor or control it directly on your Apple Watch. Haptic Alerts: Tactile feedback (vibration) ensures you never miss a set transition — even when listening to music or working out in a noisy environment. Workout Log: Your workout history is recorded automatically. Sync records between Apple Watch and iPhone to review your past sessions anytime. ■ Total Customization Freedom Handles every scenario — HIIT, Tabata, bodyweight training, stretching, boxing, and more. Second-by-Second Settings: Fine-tune preparation, exercise, rest, sets, and cooldown to match your personal routine. Preset Save: Save your favorite workout menus and launch them with a single tap next time. Switch between multiple routines with ease. ■ Perfect For You If… You want to instantly know when to switch between exercise and rest You want to build a consistent HIIT or Tabata training habit You want to precisely time your gym intervals and level up your workouts You want to use your Apple Watch to train smarter You're looking for a simple, easy-to-use timer without complicated settings Every color change programs your next move into your body. This timer is your ultimate partner for a stronger daily workout.

Shift is an interval timer made as simple as possible (but not any simpler). Set up in seconds: • Work • Rest • Repeat How long you exercise – how long you recover – how many rounds. That’s all. Tap Start and Shift takes it from there. Finished workouts stay in History, so your last workout can be your next preset. Load it and go. A few essentials: • Voice cues or simple tones that don’t lower your music • Keeps time in the background • A Live Activity on your Lock Screen and Dynamic Island • A workout display you can turn sideways • Made for iPhone and iPad Completely free. No ads, no paywall, no subscriptions. No accounts, analytics or tracking. Your workouts stay on your device.